A simplified testing method of copper loss and its temperature raise for multiunit propulsion permanent magnet synchronous motors

Large power low speed Permanent Magnet Synchronous motors are more and more widely used in propulsion areas. Their tests are relatively more inconvenient because some special and large power equipments are needed. In this paper, according to the features of multiphase and multiunit for these kinds of motors, a novel and simplified testing method of copper loss and its temperature raise is brought out. With a special control tactics, the needed characteristics were obtained without any additional equipment. The method is proved to be more practical in engineering testing.